Festo QS-1 8-4-I Push-In Fittings are compact pneumatic connectors that join 4 mm outer-diameter tubing to a 1/8" threaded port. The push-in design enables quick, tool-free insertion of the 4 mm OD tube, providing a reliable, secure fit in tight pneumatic circuits. This 8-4-I variant specifies a 1/8" thread size for compatibility with your 1/8" threaded ports and 4 mm OD tubing in compact pneumatic installations.
